Service-pipe connection for gas-mains



. UNIT D STA TE'SPATENT OFFICE.

GEORGE WESTINGHOUSE, JR, OF IITTSBURG, PENNSYLVANIA.

SERVICE-PIPE CONNECTlO N FOR GAS-MAINS= SPECIFICATION forming part ofLetters Patent No. 400,532, dated April 2, 1889.

Application filed September 13 1888. Serial No. 285,334. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE WESTINGHOUSE, J r., a citizen of the UnitedStates, residing at Pittsburg, inthe county of Allegheny and State ofPennsylvania, have invented or discovered a certain new and usefulImprovement in Service-Pipe Connections for Gas-Wlains, of whichimprovement the following is a specification.

My present invention is an improvement upon that for which LettersPatent of the United States No. 329,405 were granted and issued toJunius A. McCormick, under date of October 27, 1885; and its object isto admit of the convenient attachment of service-pipes for the deliveryof gas from a main without involving the necessity: of. perforating themain therefor, or the liability of injury to the service-pipes or theirconnections by subsequent variations of level in the main.

To this end my invention, generally stated, consists in thecombinatiomwith a pipe-joint, of an inclosing-casing adapted to receivea liquid packing, a supply-pipe leading from the main into said casing,and a service pipe or pipes leading out of said casing. The improvementclaimed is hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a longitudinal central sectionthrough a joint of a gas-main embodying my invention; Fig. 2, a plan ortop view of the same, and Fig. 3 :15]; vertical transverse section atthe line x as of The joint illustrated is of the bowl-andspigot type,the beaded end of one pipe-section, 1, entering a bowl or enlargement,3, on

the adjacent end of the next section,'2, and

' suitable packing, l, being placed around the section 1 within thebowl. The joint is inclosed by a casing, 5, made in two sections,v

end packing 16. The joint between the bowl 3 and the opposite end of thecasing is made tight by packing 7. A gas-supply pipe, 8, of

supplied to the interior'of the casing through a pipe, 10, connected toan opening in the upper end of the casing and closed by a tightremovable plug. There being an equilibrium of pressure in the main andin the interior of the casing, the hydraulic seal formed by the liquidpacking of the latter will effectually prevent leakage of gas from themain.

In order to admit of the delivery of gas from the main without directconnection thereto or forming openings and joints therein for thepurpose, as well as to obviate the objections heretofore experienced byaccidentalchanges of level in the main, as by settling or otherwise, Iform'an opening in one or both of the end wallsof the casing 5*above thelevel at which the liquid packing thereof is maintained, and connect aservice-pipe, 11, to each of said openings, which are preferablythreaded to engage corresponding external screwthreads on theservice-pipes 11. The latter may extend in line with the main for anydesired distance, and through elbows 12 are led off laterally to thepoints of delivery of the gas. Either or both of the delivery-pipeopenings in the casing are closed by temporary 'plugs'13 when the mainis laid and the joint made, if it is not required to make a servicepipeconnection or connections at that time.

It will be seen that under the above construction the service-pipes canaccommodate themselves to variations in level of the main which may fromtime to time occur, without liability to breakage or strain or thecreation of leakage by reason of the range of adjustment admitted bytheir screwconnections and by their own elasticity, as also that amaterial advantage is attained in obviating the necessity of boring themain, as heretofore, for the attachment of servicepipes.

I "claim as my invention and desire to secure by Letters Pat-en?- l. Thecombination of two pipcsections forming a joint, a casing closed at itsends around the pipe-sections adjacent to the joint and forming anannular chamber inclosing the same, and having a communicating verticalchamber provided with one or more end openings, and a gas-su pply pipewholly within said casing and leading directly from the adjacentpipe-section into the upper portion of said vertical chamber,substantially as set forth.

2. The combination of two pipe-sections forming a joint, aninclosing-casing, a liquid packing or hydraulic seal inclosed in the casing, a gas-supply pipe wholly within said casing and leading from one ofthe pipe-sections into the casing above the level of the packing, and aservice-pipe leading out of the casing above the level of the packing,substantially as set forth.

one. wns'rm'enousn, JR.

W itn esscs:

J. SNoWDEN BELL, R. H. WHITTLEsnY.

